Improvement in stone-dressing or millstone-pick hammers



o. T, FARNHAMQ Stone-Dressing or Millstone Pick-Hammer.

No. 223,123. Patented Dec. 30, 1879.

N. PETERS, PHOYO-LITMOGRAPHER. WASHXNGI'ON D C.

UNITED STATES PATENT OEETcE.

CHARLES T. FABNHAM, OF LAWRENCE, MASSACHUSETTS.

IMPROVEMENT IN STONE-DRESSING 0R MILLSTONE-PICK HAMMERS.

Specification forming part of Letters Patent No. 223,123, dated December 30, 1879; application filed November 6, 1879.

To all whom it may concern:

Be it known that I, CHARLES T. FARNHAM, of Lawrence, of the county of Essex and State ot Massachusetts, have invented a new and useful Improvement in Stone-Dressing or Millstone-Pick Hammers; and Ido hereby declare the same to be described in the following speciiication, and represented in the accompanying drawings, ot' which- Figure l is a top view, Fig. 2 a bottom view, Fig. 3 an edge view, Fig. 4 a vertical and longitudinal section, and Fig. 5 a hori zontal and longitudinal section, of a millstone dress hammer provided with my invention; the object ot' which is to enable the cutter-heel rest to be varied in position as the cutter may become worn down or its length from time to may require.

ln carrying ont my improvement l construct the hammer-head with a series of passages leading through it transversely and across the cutter-receiving socket, all being substantially as represented in the drawings, in which A denotes the hammer-head as provided with cutter-receiving sockets da openingout of each end of it, such head between such sockets having an eye, b, to receive a handle.

A cutter, B, is shown as extending both into and out. of each socket, and at its inner end or heel the said cutter is shown as resting against a movable steel abutment, C, inserted in one of series ot' passages, c c c, Sac., arranged in and extending across the head and the cuttersocket in the manner represented.

When the cutter may have become worn or sharpened down, or is not long enough to project sutticiently from the head, the heel-abutment C of the cutter may be moved or inserted Within that one o f the passages which, when the cutter is in place and against the abut ment, will cause such cutter to project the required distance beyond the head.

Screw-holes d, for reception ot' clamp-screws e, are made in the head and to open into the passages, they7 being to enable the cutter to be confined in place by any number of screws necessary.

In respect to hammer-heads wherein a series of cutters is used to extend from one or each end of the head, the socket Ator the reception ot' the series maybe formed with a set or a series of passages arranged to extend across it, into either ot' which passages the heel rest or rests of the cutters may be arranged, as circumstances may require.

A distinctive feature of difference between my improved stonedressing ham mer-head and others ot' the kind, particularly those shown in the United States Patents Nos. 42,882, 132,540, and 202,299, is that it is furnished with a screwhole to each of the cross'passages for supporting the heel-abutmentC, all being as described. Therefore,

What I claim as my invention is The stone-dressing hammer-head provided with one or more cutter-receiving sockets and a set of cross-passages to each, as set forth, and with a series of clamping-screw holes, arranged, relatively to such socket and' passages, substantially as represented.

CHARLES T. FARNHAM.

Witnesses: 4

1t. H. EDDY, W. W. LUNT. 

